A direct replacement for the old and broken one. The OEM reference number is 377178, 775519, 18-300. This water pump impeller is suitable for the Johnson Evinrude OMC 9.5/10 HP outboard motor. Easy to use and quick to install, doesn't take much time, very convenient. Made of copper and rubber, so it is durable and can be used for a long time. A good repair of the original will not damage your car easily and can prevent unnecessary leaks. Specifications: Condition: 100% New Item Type: Water Pump Impeller Color: Black and Gold Material: Copper + Rubber OEM: 377178, 775519 Number of Blades: 6 Pieces Outer Impeller Total Diameter: Approx. 69mm / 2.72 inch Inner Shaft Insert Diameter: Approx. 14.1mm / 0.56 inch Compatibility: Fits for Johnson Evinrude OMC 9.5 HP Outboard Motor 1964-1973 Fits for Johnson Evinrude OMC 10 HP Outboard Motor 1958-1963 Fits for Sierra Outboard Motor, Motor Part Number: 18-3003 Package Included: 1 x Water Pump Impeller Note: Please check the part number of your